CIS 103 Final Exam (Ch. 7 And 9)

d = { }
Explanation: There is no empty dictionary associated with d.

d = {'answer':42}

d['answer']
Explanation: Assuming that the key 'answer' exists in the dictionary, the expression would be: d['answer']

d['Monty'] = 'Python'
Explanation: To change the value mapped to by the key 'Monty' in a dictionary, you would first need to locate the key 'Monty' in the dictionary. Then, you would need to reassign the value mapped to by the key 'Monty' to 'Python'.

del d[x]
Explanation: x.The statement delete the dictionary entry whose key is equal to the value associated with x" can be interpreted in two ways. One interpretation is to delete the key-value pair from the dictionary where the key is equal to the value of x. Another interpretation is to delete the key-value pair from the dictionary where the value is equal to the key of x.Assuming the first interpretation, the code would look like this:if x in d: del d[x]This code checks to see if the value of x is a key in the dictionary, and if so, deletes the key-value pair from the dictionary.Assuming the second interpretation, the code would look like this:for k, v in d.items(): if v == x: del d[k]This code iterates through the key-value pairs in the dictionary, and if the value is equal to the key of x, deletes the key-value pair from the dictionary."

nobel_peace_prizes[2006] = "Muhammad Yunus and Grameen Bank"
Explanation: The statement that would add an entry that maps the key 2006 to Muhammad Yunus and Grameen Bank" would be as follows:nobel_peace_prizes[2006] = "Muhammad Yunus and Grameen Bank""

album_artists["Live It Out"]="Metric"
Explanation: The statement would be as follows:album_artists[Live It Out"] = "Metric""

us_cabinet["Justice Department"] = "Mukasey"
Explanation: The dictionary us_cabinet is being modified so that the key Justice Department" now points to the value "Mukasey" instead of "Gonzalez"."

s = set()

s in the_set
Explanation: Given that s has been defined, and that the_set refers to a set, the expression (s in the_set) returns True if and only if the value to which s refers is in the_set.

plist = [ ]
Explanation:Given that s has been defined, and that the_set refers to a set, the expression (s in the_set) returns True if and only if the value to which s refers is in the_set.

plist = ["spam", "eggs", "vikings"]
Explanation: A plist is a list containing exactly the elements spam", "eggs", "vikings", in that order."

tax_rates = [0.10, 0.15, 0.21, 0.28, 0.31]
Explanation: The tax_rates list consists of the five elements 0.10, 0.15, 0.21, 0.28, and 0.31, in that order. These elements represent the tax rates for the five tax brackets in the United States, which are 10%, 15%, 21%, 28%, and 31%, respectively.

plist[-1] += 5
Explanation: The last element of plist is the element at index 29. To add 5 to it, we can set the value at index 29 to be the value at index 29 plus 5.

salary_steps[-1] = 160000
Explanation: The last element in the list can be changed to 160000 with the following statement:salary_steps[4] = 160000

3 in plist
Explanation: The expression 3 in plist" will evaluate to True if 3 is an element of plist."

len(play_list)
Explanation: The expression would be len(play_list)". This would give the number of items in the list named "play_list"."

plist[0] = 3
Explanation: The first element of the list is at index 0, so the statement would be plist[0] = 3"."

t = ()
Explanation: A tuple is a data structure that is used to store a collection of data. The empty tuple is a tuple that does not contain any data.

t = (42, 56, 7)
Explanation: The statement t = (42, 56, 7) associates the tuple containing the elements 42, 56, and 7 with the variable t.